imagemagick - How to make image background transparent? -


i have 2 images:

first

http://www.eurocopter.in/contest/images/loader33.gif

second

if see first image has no background. background looks white. second image has black background.

  • question 1 : call first type of picture?

  • question 2 : how make type of picture?

  • question 3 : how transform second type of picture first type of picture?

they animated gifs, first transparent background. can separate image individual frames imagemagick (installed on linux distros , available free osx , linux) this:

convert -coalesce type1.gif frame%02d.gif

which give following 18 frames individual images

frame00.gif frame04.gif frame08.gif frame12.gif frame16.gif frame01.gif frame05.gif frame09.gif frame13.gif frame17.gif frame02.gif frame06.gif frame10.gif frame14.gif frame03.gif frame07.gif frame11.gif frame15.gif

frame00.gif

enter image description here

you can see them @ once if make them montage this:

convert -coalesce type1.gif miff:- | montage -tile x4 -frame 5 - montage.gif

enter image description here

you can find information each frame, such size this:

identify type1.gif  type1.gif[0] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[1] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[2] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[3] gif 100x100 100x100+0+0 8-bit srgb 64c 29.2kb 0.000u 0:00.000 type1.gif[4] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[5] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[6] gif 100x100 100x100+0+0 8-bit srgb 64c 29.2kb 0.000u 0:00.000 type1.gif[7] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[8] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[9] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[10] gif 100x100 100x100+0+0 8-bit srgb 64c 29.2kb 0.000u 0:00.000 type1.gif[11] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[12] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[13] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[14] gif 100x100 100x100+0+0 8-bit srgb 64c 29.2kb 0.000u 0:00.000 type1.gif[15] gif 100x100 100x100+0+0 8-bit srgb 64c 29.2kb 0.000u 0:00.000 type1.gif[16] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000 type1.gif[17] gif 100x100 100x100+0+0 8-bit srgb 128c 29.2kb 0.000u 0:00.000

you can put frames this:

convert frame* -loop 0 -delay 20 anim.gif

enter image description here

you can try , remove black background second 1 make more first one, using command this. may need fiddle fuzz factor bit:

convert type2.gif -fuzz 15% -transparent black new.gif

enter image description here


-

Popular posts from this blog

c# - ODP.NET Oracle.ManagedDataAccess causes ORA-12537 network session end of file -

overview i want replace oracle.dataaccess orcale. managed dataaccess, opening connection latter throws ora-12537 network session end of file exception. exception message / stack trace {oracleinternal.network.networkexception (0x000030f9): ora-12537 : netzwerksession: dateiende @ oracleinternal.network.readerstream.read(orabuf ob) @ oracleinternal.ttc.orabufreader.getdatafromnetwork() @ oracleinternal.ttc.orabufreader.read(boolean bignoredata) @ oracleinternal.ttc.marshallingengine.unmarshalub1(boolean bignoredata) @ oracleinternal.ttc.ttcprotocolnegotiation.readresponse()} i trying connect oracle 11g database , not have client installed on local machine. working test application (unmanaged) using oracle.dataaccess works fine . using system; using oracle.dataaccess.client; namespace app.odp.unmanaged { internal class program { private static void main(string[] args) { //dummy connection string
Read more

matlab - Compression and Decompression of ECG Signal using HUFFMAN ALGORITHM -

i want compress , decompress ecg signal stored text message text file , find out file size, cr,prd ratio,and qs. here code compression , decompression of ecg signal using huffman algorithm. i'm trying find out file size, compression ratio,prd ratio,qs. but error i'm getting the ecg file in text format. %clearing variables , screen enter code here clear all; close all; clc; [file1]=uigetfile('*.txt'); %fprintf('enter ecg file name :%s',file1); p=file1; t=sprintf('%s',p); b1=dlmread([file1]); len=length(b1); lead=input('enter lead number :'); %lead=str2double(lead); col2=b1(1:end,lead); e=fix(sqrt(len)); m=1; i=1:e j=1:e g2(i,j)=fix(col2(m)*1000); %amplifying 1000 m=m+1; end end g3=g2; i=1:e j=1:e
Read more

utf 8 - split utf-8 string into bytes in python -

i trying split utf-8 string bytes in python 3. problem is, when use bytearray, byte, encode etc functions array size of element 14 bytes, not 1 byte expected. need split text file sequence of bytes , send them byte after byte using sockets. tried this: infile = open (file, "r") str = infile.read() byte_str = bytes(str, 'utf-8') print("size of byte_str",sys.getsizeof(byte_str[0])) print gives me 14, need 1... suggestion? quoting official documentation : sys.getsizeof(object[, default]) return size of object in bytes. object can type of object. built-in objects return correct results, not have hold true third-party extensions implementation specific. only memory consumption directly attributed object accounted for, not memory consumption of objects refers to. if given, default returned if object not provide means retrieve size. otherwise typeerror raised. getsizeof() calls object’s __sizeof__ method , adds
Read more